I bought 2 cheap wind turbines on ebay for $200 each, they are made with treadmill motors so they are rated at a max output of 850 watts although I will rarely if ever see that much output from them. We do get some high winds on occasion so it is possible.
Anyway I am re-doing them a little, upgrading the hub and blades.
I have them set to charge 2 12volt batteries and then dump into a grid tie unit. I have 4 300 watt invertors attached to each of the two turbines. I was also able to find them at a decient price about $240 for all 8 grid tie invertors.
I also have a solar panel array hooked in as well but it is a small one with 4 60 watt panels and 3 5 watt panels. right now they are connected in series but I intend to get another 5 watt panel so that I have 2 sets of 4 panels, this way they can be wired in series parallel to double the output. The voltage regulator will shift it back down to 15 volts from the 24 they will each produce. but I am considering simply hooking them to another grid tie invertor since it can handle up to 26 volts input.